12062621821 has 4 divisors (see below), whose sum is σ = 12062877372. Its totient is φ = 12062366272.

The previous prime is 12062621771. The next prime is 12062621861. The reversal of 12062621821 is 12812626021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1523340900 + 10539280921 = 39030^2 + 102661^2 .

It is a cyclic number.

It is not a de Polignac number, because 12062621821 - 2⁹ = 12062621309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12062621861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34060 + ... + 159013.

It is an arithmetic number, because the mean of its divisors is an integer number (3015719343).

Almost surely, 2^12062621821 is an apocalyptic number.

It is an amenable number.

12062621821 is a deficient number, since it is larger than the sum of its proper divisors (255551).

12062621821 is an equidigital number, since it uses as much as digits as its factorization.

12062621821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255550.

The product of its (nonzero) digits is 4608, while the sum is 31.

The spelling of 12062621821 in words is "twelve billion, sixty-two million, six hundred twenty-one thousand, eight hundred twenty-one".